6. Mary is doing her homework now.

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5. The desks are very heavy.

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4. Tom's father is a doctor.

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3. They are from England.

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2. His name is David.

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1. This is my pencil.

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12. Tom's brother ________ not in the room.

11. My favorite color ________ blue.

10. ________　 you teachers? No, we ________ not. We ________ students.

9. Amy and Kay ________ here. They ________ not at home.